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Is Volvo already building lidar sensors into their public available cars?

Volvo also relies on just radar and a camera.

https://en.wikipedia.org/wiki/Autonomous_cruise_control_syst...

I don't expect scanning lidar sensors to become common here until solid state scanning lidars reach mass production.

Available cars are not fully self-driving. I think this year only Audi will release one where the car takes full control on motorways. All others require you to remain vigilant. If you sell a self-driving car you can't put warnings like this in the manual since the manufacturer is on the hook if anything happens during self-driving (at least if it was the car's fault).